Compare 39 vs 40
| Property | 39 | 40 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 2 |
| Total factors | 2 | 4 |
| Prime factorization | 31 × 131 | 23 × 51 |
| Prime factorization | 3 × 13 | 2 × 2 × 2 × 5 |
| Divisors count | 4 | 8 |
| Divisors | 1, 3, 13, 39 | 1, 2, 4, 5, 8, 10, 20, 40 |
| Number of properties | 1 | 0 |
| Semiprimes | 15th | |
| Roman numberals | XXXIX | XL |
| Base 2 | 1001112 | 1010002 |
| Base 3 | 11103 | 11113 |
| Base 4 | 2134 | 2204 |
| Base 5 | 1245 | 1305 |
| Base 6 | 1036 | 1046 |
| Base 7 | 547 | 557 |
| Base 8 | 478 | 508 |
| Base 9 | 439 | 449 |
| Base 10 | 3910 | 4010 |
| Base 11 | 3611 | 3711 |
| Base 12 | 3312 | 3412 |
| Base 13 | 3013 | 3113 |
| Base 14 | 2b14 | 2c14 |
| Base 15 | 2915 | 2a15 |
| Base 16 | 2716 | 2816 |